Kaempfe



, l wf H. ANscHUTZ-KAEMPFE.

BORING TOOL.

APPLICATION FILEDNOV- 23.1917.

Patented Aug. 19, 1919.

nul-.1. 3

l1 1 al r unrrnp sraras Parana? foreros.

HERMANN To ANsoHUrzo oo., or'NEUmu-Hnun, NEAnKIEnoEaMANY;

Boam'roorl.

Laisser.'

To- ZZ whom it may concern Be it known that I, HERMANN ANsoHTz- KAEMPFE, a subject of the Emperor of Ger-- many?, and a resident of Neumhlen, near iel, Germany, have mventedcer'taln' new `and useful Im rovements in Boring-Tools,

of which 'the ollowing is a speciication.

This invention *relates to a boring. tool i for sinking deep 'vertical holes. The tool proper, which constitutes no part of this lnventlon, comprises a suitable bit holder to the bottom of which is "fixed a boring chisel or bit having a cutting edge inclined with reference to the axis lof the holder. In

drilling with a bitof this kind, the bit has a tendency to slip od at each blow, in the direction of the high side or edge of the '-bit.

tool, aV vertical hole tends to be produced.v

By uniformly Vrotating( the 'boring lf, however, any deviation from the vertical takes place, the blows of the bit should be restricted to that portion of the circle of Arotation-.which includes the plane inwhich ldeviation has taken place, with the high point or edge of the bit on the side oppov site the position it had when the deviation took place. ln this way, a new deviation, opposed to the original deviation, will be produced. When verticality has again been restored, uniform rotatoryv motion of-A the boringtool may again be resumed.

The object of the present invention is to provide means by which it may be known by the operator at the surface of the ground when the tool has deviated from the vertical so that the boringtool may be' suitably manipulated to .make the bore truly vertical.

The invention is illustrated in panying drawing', in which.-

Figure 1 is a vertical section through the bar holding the chisel or bit,

ligs. 2 and 3 show parts of this section onan enlargedl scale, at an angle of 90 to eachother,

Fig. `4 shows the circuit of the electric drive Yused, and

Fig. '5 is a detail view" of the same.

The hollow bit holder l is provided at the the accomingfr tube rods. Apart from the oblique edge ofthe bit and the bore of the bit Vvholder which receives the measurin device,` these parts do not did'er substantially from the boring tools generally'used with Bushing' devices. Care is taken to insure that the flushing cated by the dotted lines w.

In the hollow space of the bit` holder l sNsoHTz-mmrriz, oF NEUMHLEN, Nm KIEL, GERMANY/,Inserieren f.

Specification of Letters Patent. Patented Aug. 19, llgg. i. Appleman mea november as, maY Y serial no. 203,628.

liquid. reaches the bit through the hollow bit I holder and thehollow'bo'ring rods, as indi'- I casing tube 5 of the transmitter being'lon-J gitudinallly adjustable in the outer casing tube and sup orted'by meansl of spring buliers 6 and g, while it is forced to participatein the rotation and inclinations of the bit holder. In order to bring this about,

the outer casing tube 4e is provided with ai guide projection or lip 8.

ln the transmitter is arranged a source Y.

of power 9 v(accumulator battery with an electric motor, or a clockwork operated 'by a spring or thevlike). In the construction described, it has` been assumed that this source of power 9 is an electric one. drives the driving' worm 10 which engages with the Worm wheel ll, the spindle of which is supported.' at 1l and carries a which on rotation in the'direction of the arrow shown (Fig. 3), consecutively engage with the finger 14 of a hammer l5. llhe latter comprises a bolt adjustably mounted. at 15 and controlled by the pressure ofag; spring` 1 6. The pins 13 striking the nosel 14:, drive the hammer for a short distance in' opposition to the-action of the spring 16, and then release it, 'so that its head l5 is projectedA against the wall of the inner cas- 5.- As the number of pins is four, four blows of the hammer l5 are produced at each revolution of the wheel 1l.

The toothed lwheel 12 mountedon-the spindle lof the worm wheel 11, engages witha toothed wheel 17 mounted on a shaft 18." carrying a screw-threaded barrel or worm 18. The latter can be 'connected' to, or disconnected from, a slide 19 adjustably toothed wheel l2 keyed to the outer end.. Y Thesurface of the worm wheel l1 is'provided with four pins i3 arranged in a circle,

mounted on guides 19', carrying a half-nut 19 coupling with barrel 18 and controlled by a spring 20. When barrel 18 is rotating` and in engagement with the half-nut 19", the slide 19 is shifted in opposition to the pressure of the spring 20, in Fig. 2,i to the left. On the slide 19 is mounted an electric contact 21, the object of which will be hereinafter explained. n

The shaft of barrel 18 is mounted so that it can oscillate.: It is of spherical shape at 22 and rests in a spherical bearing 22 and at kthe free end is provided with a ball shaped thickened part 23. The ball l23 is arranged in a recess of an adjustably mounted pressure pin 24,50 that, when the said pin moves down, the shaft end with the ball 23 is 4forced downward, owing to which the half-nut 19" of the slide 19 is disconnected from barrel 18, and the slide 19 isreturned to the original position by the pressure of the spring 20. The toothed wheels 12 and 17 are cut so deep that, even when the shaft 18 oscillates, they remain in engagement. To the pressure pin 24 are secured at both sides rods 24 on which are` mounted helical springs 27 and 28. The spring 27 supports a comparatively heavy plunger 25 guided in a cylinder 26. The s rlng 28 is mounted on a support 28', the p unger. 25'is provided with a hollow space 25 into which the upper rod 24 passes when the plunger 25 is moved downward in opposition to the pressure of .the sprin 27. The hollow space 25 is close'd at t ie upper end by means of a spring controlled check-valve 30. The latter opens when the plunger 25 moves downward, but closes again whenrthe plunger moves upward. An equalization of pressure can then be effected only-by means ofa fine bore 30 inthe valve.

To the plunger 25 and the cylinder 26 are secured two brackets 26 carrying the two parts of an electric contact 29. 'The contact is closed when the plunger 25 is in its upper position shown in Fig. 2, but is broken as soon as the plunger begins to move downward. v

Finally, in the lugs-31 provided on the frame is suspended a heavyf pendulum 31, the oscillation of which toward the inner spaceof the tubular casing 5 (in Fig. 2 on `the left), is limited by a stop 32, and to the right .by a stop 32. This pendulum carries the second part of the above mentioned contact 214of the slide 19. Whether this GOntact is open or closed, depends, on the one hand, on the position of theV pendulum 31,

and on' the other hand, on that of the 'slide 19.

The two electric contacts 21 and 29 are arranged in the circuit of the electric source of power 9l which operates the worm 10.. AsA

will beseen in Fig. 4, the-two contacts in working.

plunger takes place.

this circuit are connected in series. The circuit will be therefore broken, and the motor brought to a standstill even if only one of these contacts is switched out. How `and under what conditions this takes place, will be now explained together with the whole When a blow is executed` with the boring bit, the plunger 25, owing to momentum, will continue its downward movement at the moment when the boring tool strikes and the bit holder stops, the plunger compressing the suitably calculated springs 27 and 28. This will result in the pressure pin 24 being Amoved downward, and accordingly the shaft 18 of the screw spindle 18 will be turned so downward aboutl the spherical portion 22 as the pivot, until the screw spindle is disenga ed from the half-nut 19". l

movement of the slide 19 would therefore no longer take place. But owing to the downward movement of the plnger 25, the contact 29 is also broken, so that the mot-or 9, and accordingly the screw spindle 18- stop. After the blow the plunger 25 cannot at once move up under the action of the springs 27 l90 and 28, as the valve 30 closed in the meantime, admits air only slowly into the hollow space 25. The speed with which the plunger can move upward, is calculated so that, before the screw spindle can return to its` working position and the contact 29 close, a new blow--assuming regular workingand therefore a new downward movement of the,

This', condition of things is maintained as long as regular boring goes on. If the blows on the boring rods are interrupted fora longer time than that determined by the springs 27, 28, the mass of the plunger 25, the adjustment of the valve 30 etc.,for instance for more than 20 105 seconds,-only then can the plunger 25 return to its initial position, and therefore the screw spindle 18 be thrownin again and the contact 29 closed. The motor 9( would then start working if at this moment the-contact 21 were also closed. Whether however it l.will be or not, depends on the position of the pendulum 31, if the latter, and therefore the bit holder stillremain vertical, .or if the bottom end of the bit holder became inclined e willfbe closed; the motor will start and the l Wprm 10 will begin to work. The latter will drive first the Worm wheel 11 provlded c.with

the pins -13,and as alreadyv stated, the said ins will move the hammer so that the atter will execute a blow on the wall of the inner casing 5 at each passage of a pin 13 past the projection 14. These blows are transmitted to the surface through the outer casing'4 of the transmitter, through the bit holde-r and through the boring rods firmly screwed to the latter, and can there be vclearly perceived and counted, for instance by means of a listening ear-piece with rubber tube and the like, placed in the boring rods.

Simultaneously with the worm wheel 11 will start, under lthe action of the toothed wheels 12, 17, the screw spindle 18 which will move the slide 19 to the left in opposition tothe action of the spring 20. This movement is followed by the pendulum 31 which rests on the slide, until it again han-gs vertically and lags behind, whereupon the contact 21 is broken, and themotor, and

accordingly.the other parts connected to it, aswell as the slide, will come to a standstill. Until this takes pla-ce, four hammer blows are executed at each revolution of the worm wheell 11. The observed total number of blows indicates therefore to what extent the slide 19 must have moved to the left in order to reestablish the vertical po- 1. Only the oscillations of the pendulum Y to the left (in the plane of the drawing) can really be measured.

2. *The pendulum always measures only one component of the inclination.

3. The position of this component of the inclination of the bore hole is known with' certainty only relatively to thefchisel, an not relatively tothe geogi."aphicalposition of the bore hole. J

Nevertheless the indications obtained are perfectly sufficient for the purpose, as the chisel has merely to be turned to an angle of 90 to one or theother side, in order to measure in this position the other component. Moreover the position of the chisel,

in which a component assumes its maximum,

coincides withthe total inclination.' About this point itis then necessary to turn the deep edge of the chisel, instead of rotating it uniformly .ina circle, in order to equalize again the deviation produced, as described' O 1n the priorspecication. As long Vas no twisting of the transmitter relatively the-chisel takes lace, any twisting of 4the boring rods may e left out of account. If

yonly the beginnin deviation is equalized as quickly and comp etely as possible, the obas in the present apparatus, in the bit holder of' a boring instrument, but in an apparatus for plumbing a finished bore hole, such as for instance is described in Letters Patent 1,209,102 dated December 19, 1916-. The invention extends therefore also to the application of acoustic signals in such plumbing apparatus and the like devices.

I claim:

1. In a. boringtool', a bit holder, a pendulum pivotally supported upon said holder, and a motor driven soundin apparatus also attached to the holder and` controlled by the pendulum, the motor being inoperative when the bit holder is vertical.

2. In a boring tool, a bit holder, a pen-- dulumpivotally supported upon said holder and arranged to swing in but a single plane thereof, and a motor driven sounding apparatus also attached to the holder and controlled by the pendulum, the motor being inoperative when the bit holder is vertical.

8. ln' a boring toolva bit holder, a pendulum pivotally supported upon said holder and arranged to swing in but a single plane thereof, and an electrically operated .hammer also attached to the holder, the hammer circuit having a pair of vContact points which are open when the pendulum is vertical but'are adapted to be closed by the pendulum when the bit holder is inclined in the plane of the pendulum.

4. 1n a boring tool, a bit holder, an elecholder, amass resiliently attached to the holderfand arranged to move quickly with respect thereto when a boring blow is struck with the bit, and means for retarding Athe return of said mass to its original position, the operating circuit of the hammer having a pair of contact points which said mass Atrically operated hammer attached to the izo with respect thereto when a, boring blow is struck With the bit, and means for retard,- ing the return of said mass to its original position and a, pair of electrical contacts in series in the hammer circuit, one pair of said contacts being closed by the mess when in its position of rest but opening when it moves therefrom and the other pair of contacts being opened by the pendulum when it is vertical with respect to the bit holder and closed when the same becomes suitably inclined with respect to the bit'holder.

In Witness whereof I have hereunto signed my name this 22nd day of March, 1917, in the presenceof two subscribing witnesses.

DR. HERMANN ANSCHTLKAEMPEE. 

